For her rendition of the holiday classic, Alessia switched things up by slowing the song down a bit to fit her ever-so-chill vibe. Her raspy tone also gave the song a different sound that had me wishing for an actual Alessia "I Want A Hippopotamus For Christmas" studio-recorded version.

In addition to the Christmas jam, the Pains of Growing Singer performed a few of her chart-topping hits including, "Here," "Growing Pains," "Not Today," "Scars to your Beautiful," and "Stay."

"Trust My Lonely" was also included in her Jingleball setlist. The track holds a special place in Alessia's heart as she recently explained the self-written song's emotional origins in an interview with Billboard. "I was feeling a lot of voices of doubt around me and in turn I started doubting myself," she said. "I learned I had to have more trust in myself and I decided to take all of those voices of doubt from others and within myself and pretend I was breaking up with someone, like a reminder to trust myself and not think too hard and that I can be okay on my own, whether it's with writing an album or living life."

Relive all of the amazing 2018 iHeartRadio Jingle Ball performances and more during an exclusive nationwide television special on The CW on December 16th at 8 p.m. ET/PT.

Photo: Getty Images

102.7 KIIS FM's Jingle Ball

See the best moments from 102.7 KIIS FM's Jingle Ball Presented by Capital One held November 30, 2018 at The Forum!

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Ryan Seacrest Foundation

Every year, the Jingle Ball Tour gives back to the community to celebrate the holiday season. This year's official charity for the Jingle Ball Tour is the Ryan Seacrest Foundation. $1.00 of each ticket sold will be donated to the non-profit organization, which is dedicated to inspiring today's youth through entertainment and education focused initiatives.

Meet the headliners backstage for a great cause!Wish one of music's hottest acts a happy holidays in person, take a photo with them, and get four tickets to the show while benefiting the Ryan Seacrest Foundation.